Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado

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Title:
Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado
Abstract:
New 1:24,000-scale geologic mapping in the Colorado National Monument Quadrangle and adjacent areas, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of and data for the stratigraphy, structure, geologic hazards in the area from the Colorado River in Grand Valley onto the Uncompahgre Plateau. The plateau drops abruptly along northwest-trending structures toward the northeast 800 m to the Redlands area and the Colorado River in Grand Valley.
In addition to common alluvial and colluvial deposits, surficial deposits include Holocene and late Pleistocene charcoal-bearing valley-fill deposits, late to middle Pleistocene river-gravel terrace deposits, Holocene to middle Pleistocene younger, intermediate, and old fan-alluvium deposits, late to middle Pleistocene local gravel deposits, Holocene to late Pleistocene rock-fall deposits, Holocene to middle Pleistocene young and old landslide deposits, Holocene to late Pleistocene sheetwash deposits and eolian deposits, and Holocene Cienga-type deposits.
Only the lowest part of the Upper Cretaceous Mancos Shale is exposed in the map area near the Colorado River. The Upper and Lower? Cretaceous Dakota Formation and the Lower Cretaceous Burro Canyon Formation form resistant dipslopes in the Grand Valley and a prominent ridge on the plateau. Less resistant strata of the Upper Jurassic Morrison Formation consisting of the Brushy Basin, Salt Wash, and Tidwell Members form slopes on the plateau and low areas below the mountain front of the plateau. The Middle Jurassic Wanakah Formation nomenclature replaces the previously used Summerville Formation. Because an upper part of the Middle Jurassic Entrada Formation is not obviously correlated with strata found elsewhere, it is therefore not formally named; however, the lower rounded cliff former Slickrock Member is clearly present. The Lower Jurassic silica-cemented Kayenta Formation forms the cap rock for the Lower Jurassic carbonate-cemented Wingate Sandstone, which forms the impressive cliffs of the monument. The Upper Triassic Chinle Formation was deposited on the eroded and weathered Middle Proterozoic meta-igneous gneiss, pegmatite dikes, and migmatitic gneiss.
Structurally the area is deceptively challenging. Nearly flat-lying strata on the plateau are folded by northwest-trending fault-propagation folds into at least two S-shaped folds along the mountain front of the plateau. Strata under Grand Valley dip at about 6 degrees to the northeast. In the absence of local evidence, the uplifted plateau is attributed to Laramide deformation by dated analogous structures elsewhere in the Colorado Plateau. The major exposed fault records high-angle reverse relationships in the basement rocks but dissipates strain as a triangular zone of distributed microfractures and cataclastic flow into overlying Mesozoic strata that absorb the fault strain, leaving only folds. Evidence for younger, probably late Pliocene or early Pleistocene, uplift does exist at the antecedent Unaweep Canyon south and east of the map area. To what degree this younger deformation affected the map area is unknown.
Several geologic hazards affect the area. Middle and late Pleistocene landslides involving the smectite-bearing Brushy Basin Member of the Morrison Formation are extensive on the plateau and common in the Redlands below the plateau. Expansive clay in the Brushy Basin and other strata create foundation stability problems for roads and homes. Flash floods create a serious hazard to people on foot in narrow canyons in the monument and to homes close to water courses downstream from narrow restrictions close to the monument boundary.
Supplemental_Information:
Map political location: Mesa County, Colorado Compilation scale: 1:24,000 Geology mapped in 1998. 
Geospatial data files included in this data set:

cnmpoly: geologic units
cnmline: faults, fold axes, dikes, and other line features
cnmpoint: strike and dip measurements and other point features
cnmsym: cartographic decorations-strike/dip symbols, leaders, line decorations, etc.
cnmtext: text labels for map units
cnmborder: neatline of map
cnmboundary: boundary of Colorado National Monument
cnmhydro: hydrologic features
cnmhypso: elevation contours
cnmrailroads: railroads
cnmroads: roads
  1. How might this data set be cited?
    Scott, Robert B., Harding, Anne E., Hood, William C., Cole, Rex D., Livaccari, Richard F., Johnson, James B., Shroba, Ralph R., and Dickerson, Robert P., 2001, Geologic Map of Colorado National Monument and Adjacent Areas, Mesa County, Colorado: U.S. Geological Survey Geologic Investigations Series I-2740, U.S. Geological Survey, Denver, Colorado.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -108.792
    East_Bounding_Coordinate: -108.583
    North_Bounding_Coordinate: 39.125
    South_Bounding_Coordinate: 38.958
  3. What does it look like?
    http://pubs.usgs.gov/imap/i-2740/i-2740.pdf (PDF)
    graphic representation of map layout
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 2000
    Currentness_Reference:
    publication date
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set.
    2. What coordinate system is used to represent geographic features?
      The map projection used is Lambert Conformal Conic.
      Projection parameters:
      Standard_Parallel: 39.75
      Standard_Parallel: 38.45
      Longitude_of_Central_Meridian: -105.5
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 0.000
      False_Northing: 0.000
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 20
      Ordinates (y-coordinates) are specified to the nearest 20
      Planar coordinates are specified in METERS
      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview: 

    COVERAGE NAME: CNMBORDER
DESCRIPTION: Neatline of map

DATABASE STRUCTURE OF CNMBORDER.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   8    18     F      5                        -
    9  PERIMETER              8    18     F      5                        -
   17  CNMBORDER#             4     5     B      -                        -
   21  CNMBORDER-ID           4     5     B      -                        -

this database has no user-defined attributes.

DATABASE STRUCTURE OF CNMBORDER.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 8    18     F      5                        -
   25  CNMBORDER#             4     5     B      -                        -
   29  CNMBORDER-ID           4     5     B      -                        -

this database has no user-defined attributes.

---------------------------------------------------------------------------------
COVERAGE NAME: CNMBOUNDARY
DESCRIPTION: Outline (border) of Colorado National Monument

DATABASE STRUCTURE OF CNMBOUNDARY.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 4    12     F      3                        -
   21  CNMBOUNDARY#           4     5     B      -                        -
   25  CNMBOUNDARY-ID         4     5     B      -                        -
   29  AREA                   8    12     F      3                        -
   37  PERIMETER              8    12     F      3                        -

this database has no user-defined attributes.

---------------------------------------------------------------------------------
COVERAGE NAME: CNMHYDRO
DESCRIPTION: Hydrologic linework (mainly rivers and streams)

DATABASE STRUCTURE OF CNMHYDRO.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 8    18     F      5                        -
   25  CNMHYDRO#              4     5     B      -                        -
   29  CNMHYDRO-ID            4     5     B      -                        -
   33  MAJOR1                 6     6     I      -                        -
   39  MINOR1                 6     6     I      -                        -
   45  MAJOR2                 6     6     I      -                        -
   51  MINOR2                 6     6     I      -                        -


The MAJOR-MINOR code pairs in this database are standard Digital Line Graph (DLG) codes for 1:24,000-scale DLG datasets. The document "Digital Line Graphs from 1:24,000-scale Maps: Data Users Guide" lists the meanings of the DLG codes.


ATTRIBUTE NAME: MAJOR1
DESCRIPTION: DLG 'major' code
UNIQUE ITEM VALUES FOR 'MAJOR1':
50   hydrologic feature

ATTRIBUTE NAME: MINOR1
DESCRIPTION: DLG 'minor' code
UNIQUE ITEM VALUES FOR 'MINOR1':
200   shoreline
412   stream
414   ditch or canal
415   aqueduct

ATTRIBUTE NAME: MAJOR2
DESCRIPTION: DLG 'major' code
UNIQUE ITEM VALUES FOR 'MAJOR2':
-99999   no data
50       hydrologic feature

ATTRIBUTE NAME: MINOR2
DESCRIPTION: DLG 'minor' code
UNIQUE ITEM VALUES FOR 'MINOR2':
-99999   no data
414      ditch or canal
610      intermittant
617      underpassing

---------------------------------------------------------------------------------
COVERAGE NAME: CNMHYPSO
DESCRIPTION: elevation contours

DATABASE STRUCTURE OF CNMHYPSO.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 8    18     F      5                        -
   25  CNMHYPSO#              4     5     B      -                        -
   29  CNMHYPSO-ID            4     5     B      -                        -
   33  MAJOR1                 6     6     I      -                        -
   39  MINOR1                 6     6     I      -                        -
   45  MAJOR2                 6     6     I      -                        -
   51  MINOR2                 6     6     I      -                        -


The MAJOR-MINOR code pairs in this database are standard Digital Line Graph (DLG) codes for 1:24,000-scale DLG datasets. The document "Digital Line Graphs from 1:24,000-scale Maps: Data Users Guide" lists the meanings of the DLG codes.

ATTRIBUTE NAME: MAJOR1
DESCRIPTION: DLG 'major' code
UNIQUE ITEM VALUES FOR 'MAJOR1':
20     hypsography

ATTRIBUTE NAME: MINOR1
DESCRIPTION: DLG 'minor' code
UNIQUE ITEM VALUES FOR 'MINOR1':
200    contour (index or intermediate)
201    carrying contour

ATTRIBUTE NAME: MAJOR2
DESCRIPTION: DLG 'major' code
UNIQUE ITEM VALUES FOR 'MAJOR2':
22     elevation value

ATTRIBUTE NAME: MINOR2
DESCRIPTION: DLG 'minor' code
UNIQUE ITEM VALUES FOR 'MINOR2':
the values for this attribute are the elevation of the contour in integer feet, ranging from 4480 to 7240.

---------------------------------------------------------------------------------
COVERAGE NAME: CNMLINE
DESCRIPTION:  Geologic line features (folds, faults)

DATABASE STRUCTURE OF CNMLINE.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 4    12     F      3                        -
   21  CNMLINE#               4     5     B      -                        -
   25  CNMLINE-ID             4     5     B      -                        -
   29  TYPE                   3     3     I      -                        -
   32  SYMBOL                 5     5     I      -                        -
   37  DESCRIPTION          100   100     C      -                        -


ATTRIBUTE NAME: TYPE
DESCRIPTION: numeric code for type of line feature
UNIQUE ITEM VALUES FOR 'TYPE':
The values of this attribute correspond to items in the 'DESCRIPTION' field as follows:
2     contact; concealed
4     airfield line
5     line of cross-section
10    fault contact; certain
11    fault; concealed
14    fault contact; inferred
17    line; hinge
92    contact line; topographic escarpment

ATTRIBUTE NAME: SYMBOL
DESCRIPTION: line symbol (in lineset alcwrg.lin) used to draw feature
UNIQUE ITEM VALUES FOR 'SYMBOL':
0
1
3
5
25
29

ATTRIBUTE NAME: DESCRIPTION
DESCRIPTION: type of line feature
UNIQUE ITEM VALUES FOR 'DESCRIPTION':
see above

---------------------------------------------------------------------------------
COVERAGE NAME: CNMPOINT
DESCRIPTION:  point features

DATABASE STRUCTURE OF CNMPOINT.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   8    18     F      5                        -
    9  PERIMETER              8    18     F      5                        -
   17  CNMPOINT#              4     5     B      -                        -
   21  CNMPOINT-ID            4     5     B      -                        -
   25  DESCRIPTION           80    80     C      -                        -
  105  CODE                   3     3     I      -                        -
  108  STRIKE                 7     7     I      -                        -
  115  DIP                    5     5     I      -                        -


ATTRIBUTE NAME: DESCRIPTION
DESCRIPTION: type of point feature
UNIQUE ITEM VALUES FOR 'DESCRIPTION':
see below

ATTRIBUTE NAME: CODE
DESCRIPTION: numeric code for feature type
UNIQUE ITEM VALUES FOR 'CODE':
The values of this attribute correspond to items in the 'DESCRIPTION' field as follows:
201     strike and dip of inclined beds
202     strike and dip of foliation
203     dip of fault plane
207     ball & bar symbol
208     dip of inclined feature
219     overturned bed symbol
220     approximate strike and dip of inclined beds
222     strike of vertical foliation
241     direction of plunge of fold axis
268     diamond symbol indicating dip of slickensides
302     water well
312     prospect
362     horizontal bedding

ATTRIBUTE NAME: STRIKE
DESCRIPTION: compass orientation of measurement
ITEM VALUES FOR 'STRIKE':
integer degrees in the range 0-359

ATTRIBUTE NAME: DIP
DESCRIPTION: inclination from horizontal of measurement
ITEM VALUES FOR 'DIP':
integer degrees in the range 0-90


---------------------------------------------------------------------------------
COVERAGE NAME: CNMPOLY
DESCRIPTION:  geology polygon features


DATABASE STRUCTURE OF CNMPOLY.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   4    12     F      3                        -
    5  PERIMETER              4    12     F      3                        -
    9  CNMPOLY#               4     5     B      -                        -
   13  CNMPOLY-ID             4     5     B      -                        -
   17  LABEL                  6     6     C      -                        -
   23  TEXT                   6     6     C      -                        -
   29  SYMBOL                 6     6     I      -                        -


ATTRIBUTE NAME: LABEL
DESCRIPTION: text label (to be used with font fnt003); enables use of special geologic age symbols
UNIQUE ITEM VALUES FOR 'LABEL':
@c
Jeb
Jes
Jk
Jmb
Jms
Jmt
Jw
Jwek
Jwg
Kb
Kd
Km
Qal
Qaso
Qasy
Qc
Qcg
Qe
Qfp
Qfy
Qlg
Qlso
Qlsy
Qr
Qrg
Qse
Qsw
Qvf
Water
Xi
Xm
af

ATTRIBUTE NAME: TEXT
DESCRIPTION: geologic unit label
UNIQUE ITEM VALUES FOR 'TEXT':
geologic unit text abbreviations are defined as follows:
af          Artificial fill
Qal         Alluvium
Qfp         Flood-plain deposits
Qvf         Valley-fill deposits
Qrg         River-gravel terrace deposits
Qfy         Younger fan-alluvium and debris-flow deposits
Qasy        Younger alluvial-slope deposits
Qaso        Older alluvial-slope deposits
Qlg         Local gravel deposits
Qc          Colluvium
Qr          Rock-fall deposits
Qlsy        Young landslide deposits
Qlso        Old landslide deposits
Qsw         Sheetwash deposits
Qe          Eolian deposits
Qse         Eolian and sheetwash deposits
Qcg         Cienaga deposits
Km          Mancos Shale
Kd          Dakota Formation
Kb          Burro Canyon Formation
Jmb         Brushy Basin Member of the Morrison Formation
Jms         Salt Wash Member Member of the Morrison Formation
Jmt         Tidwell Member Member of the Morrison Formation
Jw          Wanakah Formation
Jeb         "Board beds" unit of the Entrada Sandstone
Jes         Slickrock Member of the Entrada Sandstone
Jk          Kayenta Formation
Jwek        Kayenta Formation, Entrada Sandstone, and Wanakah Formation, undivided
Jwg         Wingate Sandstone
TRc         Chinle Formation
Xi          Meta-igneous gneiss
Xm          Migmatic meta-sedimentary rocks
Water       water features (lakes and ponds)

ATTRIBUTE NAME: SYMBOL
DESCRIPTION: value of shade symbol in shadeset color524.shd to fill polygons
ITEM VALUES FOR 'SYMBOL':
integer numbers in the range 0 - 510


DATABASE STRUCTURE OF CNMPOLY.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 4    12     F      3                        -
   21  CNMPOLY#               4     5     B      -                        -
   25  CNMPOLY-ID             4     5     B      -                        -
   29  TYPE                   3     3     I      -                        -
   32  SYMBOL                 5     5     I      -                        -
   37  DESCRIPTION          100   100     C      -                        -


ATTRIBUTE NAME: TYPE
DESCRIPTION: numeric code for line type
UNIQUE ITEM VALUES FOR 'TYPE':
The values of this attribute correspond to items in the 'DESCRIPTION' field as follows:
1     contact; certain
2     contact; concealed
3     contact; inferred
10    fault contact; certain
14    fault contact; inferred
92    contact line; topographic escarpment
93    water boundary, certain
99    map boundary

ATTRIBUTE NAME: SYMBOL
DESCRIPTION: line symbol (in lineset alcwrg.lin) to use for plotting feature
UNIQUE ITEM VALUES FOR 'SYMBOL':
1
3
25
27
29

ATTRIBUTE NAME: DESCRIPTION
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'DESCRIPTION':
see above

---------------------------------------------------------------------------------
COVERAGE NAME: CNMRAILROADS
DESCRIPTION:  transportation: railroads

DATABASE STRUCTURE OF CNMRAILROADS.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 4    12     F      3                        -
   21  CNMRAILROADS#          4     5     B      -                        -
   25  CNMRAILROADS-ID        4     5     B      -                        -
   29  MAJOR1                 6     6     I      -                        -
   35  MINOR1                 6     6     I      -                        -
   41  MAJOR2                 6     6     I      -                        -
   47  MINOR2                 6     6     I      -                        -

The MAJOR-MINOR code pairs in this database are standard Digital Line Graph (DLG) codes for 1:24,000-scale DLG datasets. The document "Digital Line Graphs from 1:24,000-scale Maps: Data Users Guide" lists the meanings of the DLG codes.

ATTRIBUTE NAME: MAJOR1
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MAJOR1':
180

ATTRIBUTE NAME: MINOR1
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MINOR1':
201
208

ATTRIBUTE NAME: MAJOR2
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MAJOR2':
-99999
180

ATTRIBUTE NAME: MINOR2
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MINOR2':
-99999
605

---------------------------------------------------------------------------------
COVERAGE NAME: CNMROADS
DESCRIPTION:  transportation: roads

DATABASE STRUCTURE OF CNMROADS.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 8    18     F      5                        -
   25  CNMROADS#              4     5     B      -                        -
   29  CNMROADS-ID            4     5     B      -                        -
   33  MAJOR1                 6     6     I      -                        -
   39  MINOR1                 6     6     I      -                        -
   45  MAJOR2                 6     6     I      -                        -
   51  MINOR2                 6     6     I      -                        -

The MAJOR-MINOR code pairs in this database are standard Digital Line Graph (DLG) codes for 1:24,000-scale DLG datasets. The document "Digital Line Graphs from 1:24,000-scale Maps: Data Users Guide" lists the meanings of the DLG codes.

ATTRIBUTE NAME: MAJOR1
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MAJOR1':
170

ATTRIBUTE NAME: MINOR1
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MINOR1':
201
203
205
209
210
211
212
402

ATTRIBUTE NAME: MAJOR2
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MAJOR2':
-99999
0
170
172
173
174

ATTRIBUTE NAME: MINOR2
DESCRIPTION: (add brief description here)
UNIQUE ITEM VALUES FOR 'MINOR2':
-99999
0
6
70
340
601
607

---------------------------------------------------------------------------------
COVERAGE NAME: CNMSYM
DESCRIPTION:  decoration symbols


DATABASE STRUCTURE OF CNMSYM.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   4    12     F      3                        -
    5  PERIMETER              4    12     F      3                        -
    9  CNMSYM#                4     5     B      -                        -
   13  CNMSYM-ID              4     5     B      -                        -
   17  TYPE                   3     3     I      -                        -
   20  STRIKE                 7     7     I      -                        -
   27  DIP                    3     3     I      -                        -
   30  BNUM                   4     5     B      -                        -


ATTRIBUTE NAME: TYPE
DESCRIPTION: type of feature
UNIQUE ITEM VALUES FOR 'TYPE':
201     strike and dip of inclined beds
202     strike and dip of foliation
203     dip of fault plane
207     ball & bar symbol
208     dip of inclined feature
219     overturned bed symbol
220     approximate strike and dip of inclined beds
222     strike of vertical foliation
241     direction of plunge of fold axis
268     diamond symbol indicating dip of slickensides
302     water well
312     prospect
362     horizontal bedding

ATTRIBUTE NAME: STRIKE
DESCRIPTION: compass orientation of measurement
ITEM VALUES FOR 'STRIKE':
integer degrees in the range 0-359

ATTRIBUTE NAME: DIP
DESCRIPTION: inclination from horizontal of measurement
ITEM VALUES FOR 'DIP':
integer degrees in the range 0-90

ATTRIBUTE NAME: BNUM
DESCRIPTION: unique identifier used to place numeric dip values near inclination symbols
ITEM VALUES FOR 'BNUM':
positive and negative integer values; positive values of BNUM indicate that a symbol is to be drawn at that point; the dip values are placed at points with negative BNUM values.

DATABASE STRUCTURE OF CNMSYM.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 4    12     F      3                        -
   21  CNMSYM#                4     5     B      -                        -
   25  CNMSYM-ID              4     5     B      -                        -
   29  TYPE                   3     3     I      -                        -
   32  SYMBOL                 5     5     I      -                        -
   37  DESCRIPTION          100   100     C      -                        -


ATTRIBUTE NAME: TYPE
DESCRIPTION: numeric code for symbol
UNIQUE ITEM VALUES FOR 'TYPE':
The values of this attribute correspond to items in the 'DESCRIPTION' field as follows:
92      contact line; topographic escarpment
201     strike and dip of inclined beds
202     strike and dip of foliation
203     dip of fault plane
207     ball & bar symbol
208     dip of inclined feature
219     overturned bed symbol
220     approximate strike and dip of inclined beds
222     strike of vertical foliation
241     direction of plunge of fold axis
268     diamond symbol indicating dip of slickensides
302     water well
312     prospect
362     horizontal bedding


ATTRIBUTE NAME: SYMBOL
DESCRIPTION: line symbol (in alcwrg.lin) to use for plotting
UNIQUE ITEM VALUES FOR 'SYMBOL':
1

ATTRIBUTE NAME: DESCRIPTION
DESCRIPTION: type of symbol
UNIQUE ITEM VALUES FOR 'DESCRIPTION':
see above

---------------------------------------------------------------------------------
COVERAGE NAME: CNMTEXT
DESCRIPTION:  text labels for printed map

DATABASE STRUCTURE OF CNMTEXT.PAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  AREA                   4    12     F      3                        -
    5  PERIMETER              4    12     F      3                        -
    9  CNMTEXT#               4     5     B      -                        -
   13  CNMTEXT-ID             4     5     B      -                        -
   17  TYPE                   5     5     I      -                        -
   22  TEXT                 100   101     C      -                        -
  122  WSLANT                 3     3     I      -                        -


ATTRIBUTE NAME: TYPE
DESCRIPTION: numeric code for type of text item
UNIQUE ITEM VALUES FOR 'TYPE':
80    geologic unit labels and other text rendered in small typesize
200   cross-section endpoint labels and other large type labels

ATTRIBUTE NAME: TEXT
DESCRIPTION: text labels (uses font fnt003 to print special geologic age symbols)
UNIQUE ITEM VALUES FOR 'TEXT':
@c
A
A
,B,B
C1
C10
C11
C13
C2
C3
C4
C5-9
GLADE PARK FAULT
Jeb
Jes
Jk
Jmb
Jms
Jmt
Jw
Jwek
Jwg
K98.8.10F
Kb
Kd
Km
NT 11C
Qal
Qaso
Qasy
Qc
Qcg
Qe
Qfp
Qfy
Qlg
Qlso
Qlsy
Qr
Qrg
Qse
Qsw
Qvf
REDLANDS FAULT
UTE CANYON STOCK
Ute 1
Xi
Xm
Yl
a
af
gravel pits

ATTRIBUTE NAME: WSLANT
DESCRIPTION: slant angle of text labels
UNIQUE ITEM VALUES FOR 'WSLANT':
-59
-45
-42
-35
-11
-3
0

DATABASE STRUCTURE OF CNMTEXT.AAT:

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME     INDEXED?
    1  FNODE#                 4     5     B      -                        -
    5  TNODE#                 4     5     B      -                        -
    9  LPOLY#                 4     5     B      -                        -
   13  RPOLY#                 4     5     B      -                        -
   17  LENGTH                 4    12     F      3                        -
   21  CNMTEXT#               4     5     B      -                        -
   25  CNMTEXT-ID             4     5     B      -                        -
   29  SYMBOL                 3     3     I      -                        -


ATTRIBUTE NAME: SYMBOL
DESCRIPTION: line symbol (in alcwrg.lin) to use for plotting
UNIQUE ITEM VALUES FOR 'SYMBOL': 1

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Robert B. Scott
    • Anne E. Harding
    • William C. Hood
    • Rex D. Cole
    • Richard F. Livaccari
    • James B. Johnson
    • Ralph R. Shroba
    • Robert P. Dickerson
  2. Who also contributed to the data set?
    The hospitality and cooperation of the staff of Colorado National Monument added significantly to the pleasure of mapping the Monument and surrounding area, especially by providing housing with showers, kitchen, and a terrific view. In particular, the friendly support of the Superintendent Steve Hickman and his staff of park rangers made normally difficult tasks much easier. Pat Perrotti, Resource Manager for the Monument, went out of his way to fill us in on current geologic events at the Monument. Bill Rodgers, Protection Ranger, spent a day in the field with us to locate critical boundaries in the new southern addition to the Monument. Bruce Heise, National Park Service Geologic Resources Division liaison to the USGS, helped make the map a high-priority product. Joe Gregson, also with the Geologic Resources Division, obtained and transferred digital line graph (DLG) data critical for a legible topographic base for the map. The partnership with both the Colorado National Monument Association and the National Park Service has been instrumental in creation of this product for the public. In the USGS Earth Surface Processes Team, Paco Van Sistine provided prompt and critical GIS help. The constructive reviews by Bruce Bryant and Jim Yount of the USGS significantly improved the quality of the map and text. Discussions with Robert Young of Grand Junction were valuable and invigorating. The radiometric dating by Mick Kunk and Dan Unruh of the USGS provided critical constraints on the ages of Proterozoic events. The Carbon-14 dates supplied by Jack McGeehin of the USGS not only gave us the timing for geologic events during the late Quaternary, but also allowed us to date the minimum period of Native American habitation in the canyons of Colorado National Monument.
  3. To whom should users address questions about the data?
    Robert B. Scott
    U.S. Geological Survey
    P.O. Box 25046, MS 913
    Denver, CO
    USA

    303-236-1230 (voice)

Why was the data set created?

To update the interpretation and increase the scale of geologic mapping, provide a geologic map for the public to use at Colorado National Monument, and to provide sufficient geologic information for land-use and land-management decisions.

How was the data set created?

  1. From what previous works were the data drawn?
    Anderson and Lucas (1998) (source 1 of 26)
    Anderson, O.J., and Lucas, S.G., 1998, Redefinition of Morrison Formation (Upper Jurassic) and related San Rafael Group strata, southwestern U.S.: Modern Geology v. 22.

    Other_Citation_Details: p. 39-69
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Aubrey (1998) (source 2 of 26)
    Aubrey, W.M., 1998, A newly discovered, widespread fluvial facies and unconformity marking the upper Jurassic/Lower Cretaceous boundary, Colorado Plateau: Modern Geology v. 22.

    Other_Citation_Details: p. 209-233
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Cashion (1973) (source 3 of 26)
    Cashion, W.B., 1973, Geologic and structure map of the Grand Junction quadrangle, Colorado and Utah: U.S. Geological Survey Miscellaneous Investigations Series Map I-736.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: information used in compilation of map
    Cater (1966) (source 4 of 26)
    Cater, F.W., 1966, Age of the Uncompahgre uplift and Unaweep Canyon, west-central Colorado: U.S. Geological Survey Professional Paper 550-C.

    Other_Citation_Details: p. C86-C92
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Cobban and others (1994) (source 5 of 26)
    Cobban, W.A., Merewether, E.A., Fouch, T.D., and Obradovich, J.D., 1994, Some Cretaceous shorelines in the western interior of the United States:.

    Other_Citation_Details: p. 393-414
    This is part of the following larger work.

    Caputo, M.V., Peterson, J.A., and Franczyk, K.J., 1994, Mesozoic Systems of the Rocky Mountain Region, USA: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Paleogeography Symposium proceedings.

    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Cole (1987) (source 6 of 26)
    Cole, R.D., 1987, Cretaceous rocks of the Dinosaur Triangle:.

    Other_Citation_Details: p. 21-35
    This is part of the following larger work.

    Averett, W.R., 1987, Paleontology and Geology of the Dinosaur Triangle: Grand Junction Geological Society Guidebook.

    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Cole and others (1999) (source 7 of 26)
    Cole, R.D., Hood, W.C., and Scott, R.B., 1999, Sedimentological reevaluation, high-resolution gamma-ray log, and landslide hazards of the stratigraphic section at Colorado National Monument, Western Colorado: Geological Society of America Abstracts with Programs v. 31, no. 7.

    Other_Citation_Details: p. A283
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Cole and Moore (1994) (source 8 of 26)
    Cole, R.D., and Moore, G.E., 1994, Sequence stratigraphy of Cedar Mountain-Dakota interval, western and southern Piceance Creek basin, Colorado: American Association of Petroleum Geologists Annual Convention Program v. 3.

    Other_Citation_Details: p. 124
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Davis (1999) (source 9 of 26)
    Davis, G.H., 1999, Structural geology of the Colorado Plateau region of southern Utah, with special emphasis on deformation bands: Geological Society of America Special Paper 342.

    Other_Citation_Details: 157 p.
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Dubiel (1994) (source 10 of 26)
    Dubiel, R.S., 1994, Triassic deposystems, paleogeography, and paleoclimate of the western interior:.

    Other_Citation_Details: p. 133-168
    This is part of the following larger work.

    Caputo, M.V., Peterson, J.A., and Franczyk, K.J., 1994, Mesozoic Systems of the Rocky Mountain Region, USA: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Paleogeography Symposium proceedings.

    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Fouch and others (1983) (source 11 of 26)
    Fouch, T.D., Lawton, T.F., Nichols, D.J., Cashion, W.B., and Cobban, W.A., 1983, Patterns and timing of synorogenic sedimentation in Upper Cretaceous rocks of central and northeast Utah:.

    Other_Citation_Details: p. 305-336
    This is part of the following larger work.

    Reynolds, M.W., and Dolly, E.D., 1983, Mesozoic Paleogeography of the West-Central United States: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Paleogeography Symposium no. 2.

    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Gannett (1882) (source 12 of 26)
    Gannett, Henry, 1882, The Unaweep Canyon [Colorado]: Popular Scientific Monthly v. 20.

    Other_Citation_Details: p. 781-786
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Hedge and others (1968) (source 13 of 26)
    Hedge, C.E., Peterman, Z.E., Case, J.E., and Obradovich, J.D., 1968, Precambrian geochronology of the northwestern Uncompahgre Plateau, Utah and Colorado: U.S. Geological Survey Professional Paper 600-C.

    Other_Citation_Details: p. C91-C96
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Heyman (1983) (source 14 of 26)
    Heyman, O.G., 1983, Distribution and structural geometry of faults and folds along the northwestern Uncompahgre uplift, western Colorado and eastern Utah: Grand Junction Geological Society 1983 field trip guidebook.

    Other_Citation_Details: p. 45-57
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Heyman and others (1986) (source 15 of 26)
    Heyman, O.G., Huntoon, P., and White-Heyman, M., 1986, Laramide deformation of the Uncompahgre PlateauÑGeometry and Mechanisms:.

    Other_Citation_Details: p. 65-76
    This is part of the following larger work.

    Stone, D.S., 1986, New Interpretations of Northwest Colorado Geology: Rocky Mountain Association of Geologists Guidebook.

    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Hunt (1956) (source 16 of 26)
    Hunt, C.B., 1956, Cenozoic Geology of the Colorado Plateau: U.S. Geological Survey Professional Paper 279.

    Other_Citation_Details: 99 p.
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Izett and Wilcox (1982) (source 17 of 26)
    Izett, G.A., and Wilcox, R.E., 1982, Map showing localities and inferred distributions of the Huckleberry Ridge, Mesa Falls, and Lava Creek ash beds (Pearlette family ash beds) of Pliocene and Pleistocene age in the Western United States and Southern Canada: U.S. Geological Survey Miscellaneous Investigations Series Map I-1325.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 4000000
    Source_Contribution: information used in compilation of map
    Jamison (1979) (source 18 of 26)
    Jamison, W.R., 1979, Laramide deformation of the Wingate Sandstone, Colorado National Monument-A study of cataclastic flow: Texas A&M University unpublished dissertation.

    Other_Citation_Details: 170 p.
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Jamison and Stearns (1982) (source 19 of 26)
    Jamison, W.R., and Stearns, 1982, Tectonic deformation of Wingate Sandstone, Colorado National Monument: American Association of Petroleum Geologists Bulletin v. 66.

    Other_Citation_Details: p. 2584-2608
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Land (1993) (source 20 of 26)
    Land, Lewis, 1993, Three-dimensional characterization of basement faults and forced folds in clastic rocks along the northeastern edge of the Uncompahgre Plateau, western Colorado: University of Oklahoma unpublished thesis.

    Other_Citation_Details: 129 p.
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Lohman (1963) (source 21 of 26)
    Lohman, S.W., 1963, Geologic map of the Grand Junction area, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-404.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 31680
    Source_Contribution: information used in compilation of map
    Lohman (1965) (source 22 of 26)
    Lohman, S.W., 1965, Geology and Artesian Water Supply, Grand Junction Area, Colorado: U.S. Geological Survey Professional Paper 451.

    Other_Citation_Details: 149 p.
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Lohman (1981) (source 23 of 26)
    Lohman, S.W., 1981, The geologic story of Colorado National Monument: U.S. Geological Survey Bulletin 1508.

    Other_Citation_Details: 142 p.
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Marvin and others (1966) (source 24 of 26)
    Marvin, R.F., Mehnert, H.H., and Montjoy, W.M., 1966, Age of the basalt cap on Grand Mesa: U.S. Geological Survey Professional Paper 550-A.

    Other_Citation_Details: p. A181
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    Reed and others (1987) (source 25 of 26)
    Reed, J.C., Jr., Bickford, M.E., Premo, W.R., Aleinikoff, J.N., and Pallister, J.S., 1987, Evolution of the Early Proterozoic Colorado province-Constraints from U-Pb geochronology: Geology v. 15.

    Other_Citation_Details: p. 861-865
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
    White and Jacobson (1983) (source 26 of 26)
    White, M.A., and Jacobson, M.I., 1983, Structures associated with the southwest margin of the Ancestral Uncompahgre uplift: Grand Junction Geological Society Fieldtrip Guidebook 1983.

    Other_Citation_Details: p. 33-39
    Type_of_Source_Media: paper
    Source_Contribution: information used in compilation of map
  2. How were the data generated, processed, and modified?
    Date: 1999 (process 1 of 8)
    The geologic database was digitized using the GSMCAD public domain program (USGS Open-File Report 96-007).
    Date: 1999 (process 2 of 8)
    The database was exported from GSMCAD to ARC GENERATE ASCII files.
    Date: Feb-2000 (process 3 of 8)
    The gsmarc.aml program (distributed with GSMCAD) was used in ArcInfo to convert the GENERATE files to ARC coverages and build polygons.
    Date: Feb-2000 (process 4 of 8)
    USGS DLG data were imported, minimally edgematched, and clipped to the map area to create the basemap coverages cnmroads, cnmrailroads, cnmhypso, cnmhydro.
    Date: Feb-2000 (process 5 of 8)
    Attributes for geologic unit identifier were added to the .PAT file of the polygon coverage according to their GSMCAD "P1" values. Likewise, descriptive text for line and point features were added to the line and point covers according to their GSMCAD "CODE" values.
    Date: Sep-2000 (process 6 of 8)
    CODE, P1, and P2 values were dropped from each cover or renamed to more descriptive attribute names where appropriate.
    Date: Sep-2000 (process 7 of 8)
    Checkplots of the coverages were printed and checked against source materials for accuracy and completeness. The database information was checked visually and using various routines in ArcInfo for accuracy and consistency.
    Date: 15-Sep-2000 (process 8 of 8)
    Creation of original metadata record Person who carried out this activity:
    Schumann, R. Randall
    U.S. Geological Survey
    Mail Stop 913, USGS
    Box 25046, Denver Federal Center
    Denver, CO
    US

    303-236-1525 (voice)
    rschumann@usgs.gov
  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
    Data were entered and checked by the geologist that made the field observations. The attributes of this geospatial data set consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature, and determine how each feature is colored or symbolized. To check attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial dataset and the original analog compilation were corrected as needed. Machine-created listings of unique attribute values were used to identify spelling errors or other inconsistencies, and corrections were made as needed. This map has been thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature.
  2. How accurate are the geographic locations?
    Lines were primarily mapped by photo-interpretation of 1:24,000-scale color aerial photographs using a PG-2 photogrammetric plotter that rectified the position and transferred it to a basemap. Lines were digitized from the basemap using a digitizer tablet with resolution of 0.001 inch, and most digitized positions on the map are estimated to have at least 10 m horizontal accuracy. Elevation data that are included in the database are from digital line graph data from 1:24,000-scale 7.5' quadrangles.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Data are complete: no features that could be accurately represented at the compilation scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 110 square meters. All geospatial database elements are attributed.
  5. How consistent are the relationships among the observations, including topology?
    Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database. Automated (ArcInfo) routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. Check plots of the map were reviewed by at least two other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: none
Use_Constraints:
none. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data.
  1. Who distributes the data set? (Distributor 1 of 1)
    U.S. Geological Survey
    USGS Information Services
    Denver, CO
    USA

    (888) ASK-USGS (voice)
  2. What's the catalog number I need to order this data set?
  3. What legal disclaimers am I supposed to read?
    Although these digital spatial data have been subjected to rigorous review and are substantially complete, they are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from their authorized or unauthorized use.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 13-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
This page is <https://geo-nsdi.er.usgs.gov/metadata/map-i/2740/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:04:54 2018